Stone or ore crusher.



N0. 653,77l. Patented July I7, 1900.

A. c. HILSINGEB.-

STONE UR ORE CRUSHER. 7

(Application filed Sept. 11 1896.)

(No Model.) 6 Sheets--Sheet 2.

msss'gn; Patented'lul l7 I900. A. c. HILSINGEB.

STONE 0R ORE CRUSHER.

(Application filed Sept. 11, 1895.)

6 Sheets-Sheet 3 (No Iodel.)

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Patentad July I7; 1900.

No. 653,77I.

v A. C. HILSINGER. STONE 0R ORE [IR-USHER.

(Applimtion filed lopt. 11, 1895.)

6 Sheets-Sheet 4,

(No Model.)

N0. 653,77l. Patented July [7, [900. A. C. HILSINGEB.

- STONE 0R ORE GBUSHERY.

(Application med Sept. 11, 1895.)

(No Model.) a Sheets-Sheet r J 6,: l I

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UNITED STATES PATENT OFFICE.

ALBURTIS o. HILSINGER, on KILLAWOG, NEW YORK, ASSIGNOR TO CALVIN AMORY STEVENS, on NEW YORK,N. Y.

STONE OR ORE CRUSHER.

srEoIFroA'rIoN forming part of Letters Patent No. 653,771, dated. July it, 1900. A pplioation filed September ll, 1895. erial No. 562,15l. (N0 mod l- To aZZ whom it may concern:

Be it known that I, ALBURTIS O. HILSINGER, a citizen of the United States,residing at Killa wog, in the county of Broome and State of New York, have invented certain new and useful Improvements in Stone or Ore Crushers, of which the following is a specification sufficient to enable others skilled in the art.

to which the invention appertains to make and use the same.

My improvements relateto crushers for re-' ducing stones, ores, and other hard and refractory substances to a pulverized state of the class in which the reduction is effected between the inner surface of a ring and the outer surface of a roll, as in the Kent patent, No. 513,114, of January 23, 1894. An objection to this class of crushers as heretofore made is that the whole strain and jar of use is imparted to the frame through the guiderolls, to the detriment of the apparatus. The frictional resistance is also a serious objection, necessitating the employment .of the maximum of power, not to mention the eX- cessive wear and tear involved.

The main objects of my invention are to neutralize or render harmless the strain and jar of use, to lessen the frictional resistance, and to accomplish a given amount of work with an expenditure of less power.

A distinguishing feature of my invention is the arrangement of two crushing-rings and two crushing-rolls in such manner that the strain of work is sustained and neutralized by the opposed crushing-rolls, the guide-rolls acting only as such and receiving and transmitting little, if any, of the strain to the side frames.

My invention also includes certain special features in the construction and arrangement of parts hereinafter described and claimed.

In the accompanying drawings, Figure l is a front elevation of my duplex mill. Fig. 2 is a section of one of the bearings of the guiderollers on plaueof line 2 2, Fig. 1. Fig. 3 is an end elevation of the apparatus; Fig. 4, a

tional elevation taken horizontally on line '7 7,

Fig. 1.. Fig. ,8 is a central vertical section upon plane of line 8 8, Fig. 1. Fig. 9 is a front elevation showing a modification in the means for supporting the journals of the crushing-rollers. upon'plane of line l0 10, Fig. 9.

Fig.10 is a vertical section Fig. 11 isa rear view, upon a reduced scale, showing the method in which power is applied to the apparatus.

The crushing-rolls A, rings B, and guiderolls 0 are inclosed by a casing D, preferably formed in two sections, which are bolted together, as indicated in the drawings. The lower part of the casing D opens into a hopper or pocket E, preferably formed with converging sides 6 and provided with a valve or slide 6 at the bottom,'by the opening of which the coarser products which fall into the receptacle E may be removed.

The attrition-rings B are supported by and between the guide-rollers O, which are preferably flanged, so as to straddle the peripheries of the attrition-rings B. The journals 0 of the guide-rolls O are supported in adj ustable bearings F, consisting of sleeves fitting over the ends of the journals, and in turn supported in and by the hollow brackets G, through the medium of the set-screws g, the brackets G being bolted to the framework or forming a part thereof.

The inner end of the bearing-sleeves Fare fitted with bearing-plates H, fitting around the journals 0 and of sufficient width to cover the openings g, through which the said journals 0 project. These plates H are held against the edges of the openings g by springs interposed between them and the inner ends of the bearings F or by equivalent means. The openings g are sufficiently large to amply 9,0 allow for the adjustment of the guide-rolls G with relation to the attrition-rings B by means of the set-screws g.

The peripheries of the attrition-rings B not only travel over the peripheries of the guide- 5 rollers, but also against each other, andthis is an important feature of construction, since by this arrangement of the parts the strain exerted by the crushing-rolls A A is met and neutralized in such manner that the guide-c zoo rolls 0 are practically relieved from all strain and act simply to centralize and sustain the attrition-rings, as will be hereinafter more clearly set forth.

The axes of the crushing-rolls A are preferably arranged upon a lower horizontal plane than the axes of the attrition-rings B, so as to form a slight pocket or space between the opposed surfaces above the plane of the axes of the crushing-rollers A and below the'plane of the axes of the attrition-rings B, thereby insuring a more perfect hold on the material as fed between the opposed surfaces than would occur were the axes of the crushing rolls A in the same horizontal line or above the plane of the axes of the attrition-rim gs B.

The journals a of the crushing-rolls A are mounted in bearings I, which are free to adapt themselves to variations in the size and quantity of material passing between the inner surfaces of the attrition-rings B- and the peripheries of the crushing-rolls A. This may be accomplished by supporting the bearings or boxes I upon the ends of rock-levers J or by simply having the journals (t mounted in box-bearings I, supported in slots or ways cl, as shown in Figs. 9 and 10, orby any other suitable means that will accomplish the same end. In either case the rolls A are pressed toward the inner sides of the rings B by an elastic pressure, as by the springs K shown in the drawings. are arranged on either side of the apparatus, so as to equalize the pressure at both ends of the journals Ct. A convenient way of applying them is that shown in the drawings, in which horizontal rods L, supported rigidly upon the frame, carry springs upon their outer ends, which bear against the outer sides of the bearings I I in such manner as to tend constantly to force the crushing-rolls A A toward each other and into frictional contact with the inner surfaces of the attritionrings B B.

By adjusting the nuts 6 on the outer ends of the rods L the tension of the several springs may be increased or diminished, so as to force 4 the crushing-rolls A A with more or less pressure into contact with the inner surfaces of the attrition-rings B B or with the material introduced between the opposed surfaces. By this arrangement the peripheries of the attrition-rings B B are also forced with more or less pressure into contact with each other, since the crushing-rolls A A are located approximately on opposite sides of the line of cont-act between the rings B B, as will be seen by reference to Fig. 5.

Where the journal-bearings I are formed upon rocking levers J, the journals to of the crushing-rolls A A pass loosely through segmental slots (1 d in the covers (1 cl, which fit over the openings 61 (Pin the sides'of the easing D, the said covers when removed permitting a removal of the crushing-rolls A A when necessary. Vhere the rock-levers J J are dispensed with and the journals a a mounted in boxes I, as in Fig. 9, the slots d d are These springs K horizontal, their edges acting as guides and supports for the inner ends of the boxes, as indicated in Fig. -10.

On the sides of the casing D are arranged feed-hoppers M M, discharging onto inclined feed-tables m m, arranged within the casing D directly above the crushing-rolls A A, the said feed-tables being inclined inwardly and downwardly, so as to deliver the material from above and between the peripheries of the crushing-rolls A A and the inner surfaces of the attrition-rings.

The inner surfaces of the attrition-rings are preferably made concave in cross-section, while the peripheries of the crushing-rolls are made convex to correspond, the object being to cause the material under treatment to tend by centrifugal force to collect in the center of the rings and be thereby retained and passed between the crushing-surfaces. This tendency of centrifugal force to carry around i the material upon the inner surface of the attrition-rings has to be counteracted, however, in the case of material already suificiently reduced, as otherwise there would be a needless expenditure of power and a waste of time, and this I accomplish, as set forth in my concurrent application,Serial No. 625,104,

filed February 26, 1897, which is a subdivision of the present application, by air-blasts directed against the inner surfaces of the attritionrings, preferably at or nearest the highest points.

P is an air-pressure pipe formed with perforations 19. Screens Q Q permit only of the finer particles to pass with the air-blast, returning the coarser particles to the feed-tables m m.

The removal of the finer products of reduction is efifected and the apparatus kept clean and free from dust by suction through a discharge-pipe T, connected with exhaust-fans or other suitable means for creating and maintaining a partial vacuum in the apparatus.

The lower part i only of the exhaust pipe T opens into the space between the casing,

so that heavier particles descending will be deflected and drop into the hopper E below, to be returned, if necessary, to the feed-hoppers M M.

The pressure of the air-blasts'Pp is regu-' lated with relation to the degree of suction exerted through the discharge-pipe T in such manner that a partial vacuum is maintained in the interior of the apparatus, especially the lower portion, and hence the atmospheric pressure without tends to create inward currents of air through bearings and joints of all kinds, such inward flow of air being sufficient to keep the parts free from grit and dust.

Thus the wear and tear in this class of crush-- ing apparatus is reduced and its use rendered more safe and cleanlyj In order to drive the machine, I employ a belt N, connected with suitable driving ma-. chinery, so as to impart a traveling motion ice to the belt, the latter passing first over apulley O, secured on one outer end of the shaft a of a crushing-roll A, and then over a second pulley 0, attached to the shaft a of the other crushing-roll A, and then the belt passes over a third pulley 0 secured to the shaft 0 of one of the guide-rolls O, as indicated in Fig. 11. It will be seen that by this arrangement the belt revolves the crushing-rolls A A and at the same time exerts aprcssure on the said pulleys in such manner as to force the crushing-rolls A A toward each other, thus aiding the springs K K, throwing practically the whole thrust or strain upon the attritionrings where the latter come in contact peripherally, and relieving the guide-rolls O, and consequently the frame D, of the maximum of strain. By this means the powerimparted to one crushing-roll is met and neutralized by that imparted to the other crushing-roll, and the opposed attrition-rolls in peripheral contact are the means by which all the power transmitted is utilized in the reduction of the material under treatment.

I am aware that rings have been employed in the crushing or reduction of sugar-cane, &c., passed between their peripheries, the object being to increase the circumferential bearing of the surfaces; but I am not aware that attrition-rings have ever been opposed to each other peripherally, so as to utilize all the powerin the crushing of material between the crushing-rolls and the inner surfaces of the rings.

The springs K K perform a double function,in that they not only tend constantly to throw the peripheries of the crushing-rolls into contact'with the inner surfaces of the attrition-rings, but also receive and compensate for differences in strain resulting from variations in the quantity or size of the material under treatment. In fact, the strain between the crushing-rolls is taken up and neutralized by the springs, so that the frame, guide-rolls, &c., are practically relieved of all strain and the full force is distributed and expended between the peripheries of the crushing-rolls and the inner surfaces of the attrition rings. will accomplish a given amount of work with much less power than would be required to accomplish the same resultin two single mills, in which the strain comes directly on the guide-rolls, disc. increasing the frictional contact and straining, the framework. It is also obvious that by my invention I lessen and deaden the jar and pounding attributable to variations in the size of material under treatment, since the opposed springs receive and neutralize all shocks or irregularities of strain arising from that cause.

I do not herein seek to claim the use of an air-blast in connection with revoluble attrition-ring and crushing-roll nor the screening of the material dislodged by the air-blast, as these features form the subject-matter of a Hence my duplex crushersubdivision of this application, hereinbefore referred to.

WVhat I claim as my invention, and desire to secure by Letters Patent, is-

1. In a stone and ore crusher, the combination of two revoluble attrition-rings mounted on guide-rolls and in peripheral contact with each other, and opposed internal crushingrolls in said attrition-rings, the journals of the opposed crushing-rolls being supported in bearings which are connected with springs which tend constantly to force the peripheries of the rolls into contact With the interior surfaces of the rings,substantially in the manner and for the purpose described.

2. A stone and ore crusher comprising revoluble rings in peripheral contact with each other,crushing-rolls in interior frictional contact with the said rings, rocker-arms carrying the shafts for the said crushing-rolls, and guide-rolls carrying the said rings, substantially as shown and described.

8. A stone and ore crusher comprising revoluble rings in peripheral contact with each other, crushing-rolls in interior frictional contact with the said rings, rocker-arms carrying the shafts for the said crushing-rolls, and springs pressing on said rocker-arms to regulate the frictional contact between the rolls and rings, substantially as shown and de scribed.

4. A stone and ore crusher, comprising two rings in peripheral contact with each other, guide rolls for supporting the said rings, crushing-rolls in interior peripheral contact with the said rings, rocker-arms carrying the shafts of the said crusher-rolls, and springs pressing on the free ends of the said rockerarms to move the said crushing-rolls toward each other to regulate the frictional contact with the rings, substantially as shown and described.

5. A stone and ore crusher, comprising two rings in peripheral contact with each-other, guide rolls for supporting the said rings, crushing-rolls in interior peripheral contact with the said rings, rocker-arms, carrying the shafts of the said crushing-rolls,springs pressing on the free ends of the said rocker-arms to move the said crushing-rolls toward each other to regulate their frictional contact with the rings, and fixed rods carrying the said springs, the said rods being provided -with means for regulating the tension of the said springs, substantially as shown and described.

0. A stone and ore crusher,comprising rings in peripheral contact with each other, guiderolls for supporting the said rings, crushingrolls in interior peripheral contact with the said rings, pulleys on the shafts of the said crushing-rolls and on the shaft of one of the said guide-rollers, and a driving-belt passing over the said pulleys in such manner as to rotate the crushing-rolls and move the same toward each other, substantially as shown and described.

7 In a pulverizer, two revoluble crushingport and guide said rings, substantially as de= rings in periplieral contact with each other; scribed. a crushing-roll within each ring adapted to W press upon the ring below the contact-point V ALBURTIS HILSINGER' 5 of the two rings; yielding bearings to said Witnesses:

crushing-roll shafts; springs adapted to force JOHN BAXTER, said rolls toward said rings and rollers to sup- WILLIAM ULERY. 

